On 03/05/21 21:18, Denis V. Lunev wrote:

On 5/3/21 5:54 PM, Paolo Bonzini wrote:

quoted

On 29/04/21 03:00, Sean Christopherson wrote:

quoted

On Wed, Apr 28, 2021, Valeriy Vdovin wrote:

quoted

It's very explicit by the code that it was designed to receive some
small number of entries to return E2BIG along with the corrected
number.

LOL, saying KVM_GET_CPUID2 was "designed" is definitely giving the KVM
forefathers the benefit of the doubt.

I was going to make a different joke, i.e. that KVM_GET_CPUID2 was
indeed designed the way Valeriy described, but that design was
forgotten soon after.

Really, this ioctl has been such a trainwreck that I think the only
good solution here is to drop it.

Paolo

should we discuss KVM_GET_CPUID3 which will work "normally"?

Is anybody using KVM_GET_CPUID2 at all?

Paolo